| /** |
| Copyright (C) 2005 Michael Ahlberg, Måns Rullgård |
| |
| Permission is hereby granted, free of charge, to any person |
| obtaining a copy of this software and associated documentation |
| files (the "Software"), to deal in the Software without |
| restriction, including without limitation the rights to use, copy, |
| modify, merge, publish, distribute, sublicense, and/or sell copies |
| of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| DEALINGS IN THE SOFTWARE. |
| **/ |
| |
| #ifndef AVFORMAT_OGGDEC_H |
| #define AVFORMAT_OGGDEC_H |
| |
| #include "avformat.h" |
| #include "metadata.h" |
| |
| struct ogg_codec { |
| const int8_t *magic; |
| uint8_t magicsize; |
| const int8_t *name; |
| /** |
| * Attempt to process a packet as a header |
| * @return 1 if the packet was a valid header, |
| * 0 if the packet was not a header (was a data packet) |
| * -1 if an error occurred or for unsupported stream |
| */ |
| int (*header)(AVFormatContext *, int); |
| int (*packet)(AVFormatContext *, int); |
| /** |
| * Translate a granule into a timestamp. |
| * Will set dts if non-null and known. |
| * @return pts |
| */ |
| uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts); |
| /** |
| * 1 if granule is the start time of the associated packet. |
| * 0 if granule is the end time of the associated packet. |
| */ |
| int granule_is_start; |
| /** |
| * Number of expected headers |
| */ |
| int nb_header; |
| void (*cleanup)(AVFormatContext *s, int idx); |
| }; |
| |
| struct ogg_stream { |
| uint8_t *buf; |
| unsigned int bufsize; |
| unsigned int bufpos; |
| unsigned int pstart; |
| unsigned int psize; |
| unsigned int pflags; |
| unsigned int pduration; |
| uint32_t serial; |
| uint64_t granule; |
| uint64_t start_granule; |
| int64_t lastpts; |
| int64_t lastdts; |
| int64_t sync_pos; ///< file offset of the first page needed to reconstruct the current packet |
| int64_t page_pos; ///< file offset of the current page |
| int flags; |
| const struct ogg_codec *codec; |
| int header; |
| int nsegs, segp; |
| uint8_t segments[255]; |
| int incomplete; ///< whether we're expecting a continuation in the next page |
| int page_end; ///< current packet is the last one completed in the page |
| int keyframe_seek; |
| int got_start; |
| int got_data; ///< 1 if the stream got some data (non-initial packets), 0 otherwise |
| int nb_header; ///< set to the number of parsed headers |
| int start_trimming; ///< set the number of packets to drop from the start |
| int end_trimming; ///< set the number of packets to drop from the end |
| uint8_t *new_metadata; |
| unsigned int new_metadata_size; |
| void *private; |
| }; |
| |
| struct ogg_state { |
| uint64_t pos; |
| int curidx; |
| struct ogg_state *next; |
| int nstreams; |
| struct ogg_stream streams[1]; |
| }; |
| |
| struct ogg { |
| struct ogg_stream *streams; |
| int nstreams; |
| int headers; |
| int curidx; |
| int64_t page_pos; ///< file offset of the current page |
| struct ogg_state *state; |
| }; |
| |
| #define OGG_FLAG_CONT 1 |
| #define OGG_FLAG_BOS 2 |
| #define OGG_FLAG_EOS 4 |
| |
| #define OGG_NOGRANULE_VALUE (-1ull) |
| |
| extern const struct ogg_codec ff_celt_codec; |
| extern const struct ogg_codec ff_dirac_codec; |
| extern const struct ogg_codec ff_flac_codec; |
| extern const struct ogg_codec ff_ogm_audio_codec; |
| extern const struct ogg_codec ff_ogm_old_codec; |
| extern const struct ogg_codec ff_ogm_text_codec; |
| extern const struct ogg_codec ff_ogm_video_codec; |
| extern const struct ogg_codec ff_old_dirac_codec; |
| extern const struct ogg_codec ff_old_flac_codec; |
| extern const struct ogg_codec ff_opus_codec; |
| extern const struct ogg_codec ff_skeleton_codec; |
| extern const struct ogg_codec ff_speex_codec; |
| extern const struct ogg_codec ff_theora_codec; |
| extern const struct ogg_codec ff_vorbis_codec; |
| extern const struct ogg_codec ff_vp8_codec; |
| |
| int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, |
| const uint8_t *buf, int size, int parse_picture); |
| |
| int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, |
| const uint8_t *buf, int size); |
| |
| static inline int |
| ogg_find_stream (struct ogg * ogg, int serial) |
| { |
| int i; |
| |
| for (i = 0; i < ogg->nstreams; i++) |
| if (ogg->streams[i].serial == serial) |
| return i; |
| |
| return -1; |
| } |
| |
| static inline uint64_t |
| ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts) |
| { |
| struct ogg *ogg = s->priv_data; |
| struct ogg_stream *os = ogg->streams + i; |
| uint64_t pts = AV_NOPTS_VALUE; |
| |
| if(os->codec && os->codec->gptopts){ |
| pts = os->codec->gptopts(s, i, gp, dts); |
| } else { |
| pts = gp; |
| if (dts) |
| *dts = pts; |
| } |
| if (pts > INT64_MAX && pts != AV_NOPTS_VALUE) { |
| // The return type is unsigned, we thus cannot return negative pts |
| av_log(s, AV_LOG_ERROR, "invalid pts %"PRId64"\n", pts); |
| pts = AV_NOPTS_VALUE; |
| } |
| |
| return pts; |
| } |
| |
| #endif /* AVFORMAT_OGGDEC_H */ |